17、已知某高炉煤气的湿成份为:H2,2%;CH4,0.1%;CO,25%;CO2,18%;N2,53.9%;O2,0.1%;此外,CO的低发热值为3020 kal/m3;H2低发热值为2580kal/m3;CH4的低发热值为8550 kal/m3;试计算此高炉煤气的低发热值为多少kj/m3?
解:从题知此高炉煤气中的可燃成份有:H2, 2%, CH4,0.1%, CO,25%,
则 Q低=3020 CO%+2580 H2%+8550 CH4%
=3020×25%+2580×2%+8550×0.1%
=815.15kal/m3
Q低=815.15×4.187
=3413 kJ/m3